Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 43: Plasmonics and Nanooptics IV

O 43.4: Vortrag

Mittwoch, 13. März 2013, 11:15–11:30, H31

Strong SERS Enhancement Based on Large Area Controllable Gold Nanoparticle Arrays with High Uniformity and Reproducibility — •Yan Zheng, Chengliang Wang, Wenxin Wang, Felix Stosberg, and Yong Lei — Fachgebiet 3D-Nanostrukturierung, Institut fuer Physik & IMN MacroNano, Technische Universitaet Ilmenau, Germany

Significant SERS (surface enhanced Raman Scattering) enhancement with uniformity and reproducibility are achieved based on controllable highly ordered gold nanoparticle arrays, which can be obtained in large area by using ultra-thin alumina membranes (UTAMs) as shadow masks[1-2]. By controlling the anodization process, the pore-widening period of UTAM masks and the thermal deposition of nanoparticles, ordered Au nanoparticle arrays with different diameter and different surface morphology were obtained[3]. The Raman spectra of the Au nanoparticle arrays suggest that rough surface morphology can facilitate the SERS effect and the optimum diameter of nanoparticles is about 55 nm. All the results indicate that the template-prepared highly ordered Au nanoparticles on Si wafers with reproducible homogeneous SERS signals are high performance SERS substrates, which shall have important applications for SERS-related devices.

[1] Lei Y., Yang S.H., Wu M.H., Wilde G., Chemical Society Reviews, 40(3), 1247-1258, 2011. [2] Yang S.K., Cai W.P., Kong L.C., Lei Y., Advanced Functional Materials. 20(15), 2527-2533, 2010. [3] Wen L.Y., Wu M.H., Ostendorp S., Chen K., Wilde G., Lei Y., Small, 6(5), 695-699, 2010.